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Which mechanism causes increased critical current in superconducting wires with artificial pinning centers?

A)Flux pinning enhancement
B)Decreased Cooper pair density
C)Increased phonon scattering
D)Suppressed Meissner effect

💡 Explanation

Flux pinning enhancement causes the increased critical current, because pinning centers trap magnetic flux lines, preventing their motion that would dissipate energy; therefore, higher currents can be sustained, rather than being limited by flux flow resistance.

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